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My Sister Controls Me

My Sister Controls Me

by Eroticalion
12 min read
4.49 (19400 views)
chastitycfnmgentle dommemulti-partblonde
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I idly lay on my freshly made bed. It's a beautiful, warm June night, yet I had nothing to do. Board out of mind I switched from Instagram to Netflix, to Twitter and so. This is the beginning of my first summer home from college, and I'm struggling to readjust. Most of my friends from high school are busy with work or are still away at their colleges. My friends from college are all across the country. I am bored, I am alone, I am on Twitter.

Scrolling and scrolling, my algorithm slowly leads me to spicier and spicier posts. Thirst traps lead to onlyfans profile pages. I can't help myself from being interested, and soon I'm falling down the rabbit hole. Finally feeling inspired to consume, or be consumed by something, I open my private browser, P-o-r-n-h-u-b I quickly type, slightly disgusted with myself. This is going to be my 3rd time beating it today. I go to the search bar, 'step-sister pov joi' I gently rub myself through my shorts as I browse the options. Looking for the right video with the right girl. Weirdly, this is my favorite part of the process, slowly going through the videos and profiles, refining my search until I find the perfect video. Lately, I've been into pov videos of petite blonde women, especially dominant women, or at least girls who are eager to get fucked. I hate to admit it, but those videos remind me of my little sister, who is a year younger than I and has just graduated high school. I came home for her 18th birthday over spring break, and we went to a house party to celebrate. She wore this little black cocktail dress that was so short you could almost see her asscheeks meet her thighs. I couldn't believe it, but I was honestly turned on by seeing her dress like that. I was so used to seeing her in PJs, workout clothes, and soccer uniforms, that I'd never fully realized that she could be sexy if she wanted to. It sort of sent me into a spiral that lead to where I was now, on my bed, looking for pornstars who have the same beach blonde hair and slim, athletic bodies as my sister. I got so lost in my search, I almost didn't hear the knock on my door.

"Can we come in?" I hear my mom tentatively ask from the hallway, "Your sister and I want to talk"

"Uhhh, Come in!" I try (and fail) to respond casually, my fingers flying to close my browser and open up a normal app. I jolt to sit up, hiding my boner as my mom opens the door. She leads my sister into my room and sits on my bed next to me. My sister awkwardly leans against my desk across the room. They look nervous. Apprehension fills the air and I nervously ask "What's up?"

"Well," my mom starts, putting her and on my knee "Your sister and I have noticed something since you came back," She makes eye contact with me, I anticipate what she's going to say next. I can see it in her pale blue eyes, it sounds ridiculous, but I feel her words rushing towards me like a truck. My heart pounds as I brace for the impact. My mom, a very sweet lady, has never been one to mince words. I don't know exactly what she going to say but I know it's going to be direct, and from the vibes in the room, probably uncomfortable Too.

"We noticed that you're masturbating a lot, sweetie"

Adrenaline hits my body as I wrap my head around being called out. I want to speak and defend myself, but shock renders me speechless.

"I can hear your bed squeak through the wall," my sister explains, nervously fidgeting with something in her sweatpants pocket. "I don't think it's healthy to do that so much"

"Your sisters right sweetie, it isn't healthy," my mom continues, "but that's why we want to help you. Your sister had a great idea, why don't you tell him what it is, Evelyn?"

I look back at my sister as she pulls whatever she is messing with out of her pocket. She looks at me with a kind, knowing expression, "I thought It would help if we locked you in a chastity cage," she shyly suggests, smiling and presenting a shiny metal cage in the palm of her hand. "This way you wouldn't have to handle your urges by yourself"

I feel my body start shaking as I go into a fight or flight type deal. My brain struggles to process the object in her hands. I'm offended by their need to intervene with my life. But excited by my sister's presence, by her acknowledgment of my sexual existence. Part of me wants to protest, but too much of me is curious. Weakly, I ask; "Chastity?"

"Yes sweetie," my mom answered, "This would be tea good for you,"

"Don't worry, I read a book about it." My sister anxiously assures. "It worked really well for the characters in there, and when I heard you beating it all the time, I thought it might work for you too" I stared at her in astonishment. Her hair was in a messy ponytail, and her t-shirt was loose and cropped, concealing her small perky tits, but showcasing her flat stomach and thin waist. Her gray sweatpants were loose too but looked good draping off of her strong hips and athletic, thick thighs. She looked so cute leaning on my desk, I couldn't grasp the severity of what she was suggesting.

"How would it work?" I asked. Surprising everyone, including myself, with my lack of resistance.

"Well, um," Evelyn started, nervously sallowing, "What would happen is, we'd cage your, uh, you. So that way you couldn't get hard, or pleasure yourself. Under supervision, we'd let you out for cleaning, and occasionally for you to relieve yourself, sexually."

"What would stop me from just unlocking the cage?" I ask.

"I would be your keyholder" my sister responded, "Only I could unlock you"

"Since she's the expert," my mom explained, clearly proud of her daughter's idea. I felt my boner twitch in my pants. This was turning me on. I'd never considered or even thought about chastity before, but something about this enticed me. "I'd get to take it off to clean?"

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"Yes, every day or every other day at most," my sister began to speak more confidently now, it was clear she put real thought into this.

"How often would I be let out for uhh.."

"For pleasure?" My sister said, smiling as she finished my sentence. "Once a week is recommended, but it depends on your behavior. If you resist your cage or try to sneak extra orgasms, then I'd have to stretch it out longer."

My mom smiled at me too, "Your sister did a lot of research, I think this'll be really good for you."

"Just for the summer?" I ask, amazed that I'm even entertaining this.

"Just for the summer," my mom confirms, nodding at my sister.

I take a second to try and compose myself. I realize that letting your little sister lock you in chastity is insane, but I am still so horny, so turned on by the thought of my sister involving hers in my sexuality, I can't think straight. I look at my sister for reassurance, she looks small and dainty, but also powerful and confident, all at once. I trust her. I can't believe it, but I actually want her to do this to me. She's still holding the cage in her hands, presenting it to me like a perverse prize. Made of metal and coming in 3 parts, a ring, a curved cage, and a little padlock that joins the 2 together. It shines with brilliance and radiates an alluring energy. I looked up at Evelyn's face, she smiled back at me, eagerly awaiting my response. "Ok," I said "let's do this"

"Ok!" My mom exclaimed happily, clapping her hands together "I'll let you two get started, I don't think I need to be here for that, do I?"

"No Mom," my sister answered as our mom stood, "I got it from here"

"Sounds good sweetie," my mom responded, closing the door behind her as she left the room. It was just my sister and I now alone in my room now.

"So, the first thing we need to do is measure you so that we know the cage is the right size. Stand up so we can get started"

"Do we have to do this right away?" I ask, nervously shifting my weight, I realize that I really shouldn't be hard right now. Anxiety fills me as I think about how I could explain my boner away.

"Yes," she tells me firmly, "I want us to get you started right away,"

My mind frantically races for an excuse, "I just can't right now," I offer her out of ideas.

"Why not?" she looks me up and down with frustration. Then I see a realization come across her face. "Oh my god," she says in surprise, "you're fucking into this, aren't you?" I can only give her a weak smile in response. "No wonder you gave in to me so easily," she says

"Does this mean you won't do this for me anymore?" I shyly ask

"No, this means I have to do this for you, you fucking perv" she laughs, "Don't worry, I know what to do, I'll be right back,"

She leaves and quickly returns with a bag of frozen peas. She holds them up for me to see, "I got peas for your peas-nis" she jokes, tossing them to me. "Ice yourself" she instructs. Her humor surprises me but still eases my nerves. I lay the bag on my lap tentatively. "It works better if you put the bag right on your skin," she says, "go under the pants," I follow her directions, the cold, frosty bag stung when it came in contact with my hot skin. I could feel the cold start working immediately, slowly shrinking my shaft. "Why do you know so much about this" I ask her.

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She sits crisscrossed next to me on the bed, "I told you," she explained, "I read a book"

"What book?" I ask

She sheepishly looked around, smiling, "Domme Chronicles: Erotic Tales of Love, Passion & Domination" she admits.

"Oh my god," I say in disbelief. "I thought it was a research paper or something?"

"It's based on a true story!" She protests. Putting her hand on the lump of frozen peas under my pants "Don't worry, I know what I'm doing"

"I would fucking hope so," I say. "How did you get Mom to let you do this?"

"Come on," she looks at me "you know how gullible mom is"

"Yeah," I chuckled, "but I'm still surprised you brought it up"

"Well I think it's a really good idea," she responded "I'm surprised you bought in so quickly"

"Yeah," I awkwardly said again, unsure of how to respond. "I feel back to my normal size now,"

"Good," she looks me in the eye, "now stand up and take your pants off so we can measure"

My heart rate picks up again. I felt like I was about to give a presentation in school. I stood up and dropped my pants as quickly as I could. She takes a tape measure and quickly holds it up to my shaft. "I'm a grower, not a shower" I awkwardly explain.

"You won't be for long," she quips, "I did a good job guessing your size, this cage will fit" She takes the cage out with a bottle of lube. Quickly she rubs the lube on the inside of the cage and slides it over, It snugly fits around me. I was afraid it would hurt, but it didn't, it just gave a very soft pressure.

"So pretty," she says. Wrapping the tape measure around the base of my penis and the backside of my balls. I feel excitement rush over me. The pressure on my dick increases as my body tries to get hard.

"So," I ask "you read a dominatrix romance novel and thought of me?"

She looks at me with a mischievous grin, "Maybe" she teases, finding the right size ring and clamping it around me. She holds up the lock so I can see it. "Maybe, I've been seeing the way you look at me recently, brother. Maybe I know what a man's lustful gaze feels like, and maybe I like the way it feels," she clamps the little padlock on the cage, fully submitting me to her chastity. "Maybe I'm turned on by the thought of controlling you," she grabs my cage and gently pulls me towards her, the ring putting pressure on my balls and forcing me to be servant. She bites her lip. My legs get weak. I almost buckle from the excitement, she revels in it. "Maybe I want to tease and edge you and make you do whatever I want. Maybe my pussy gets wet from locking your cock up," I swallow, nervous, surprised, and most of all thrilled. "Do you want to find out?" She seductively asks, taking my hand in hers.

"Please," I desperately whimper, relishing the pressure my cage is pushing onto me. It doesn't feel good, but it doesn't feel bad either. It just feels right. She pulls the waistband of her sweats so it can see down them. She's not wearing panties. Her little pussy is shaved, cleaned, and perfect. Slowly, she guides my hand down her flat stomach. Her skin is impossibly soft, almost feeling fragile. Anticipation and excitement build as my hand gets close. Finally, my fingertips touch. Her little pussy feels unbelievably wet. I go to touch her clit, to stimulate her, but she rips my hand away. She looks me in the eyes with an intense and powerful force. "Maybe," she demands "If you do everything I say, then I'll reward you, I'll let you touch and feel my body, I'll even let you get off. But maybe, if you don't submit to me, I'll throw away the key and trap you forever, do you understand?"

"Yes Evelyn," I say, feeling the full force of the cage squeeze onto me now, "I'll do whatever you want me to."

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